Improvement in elevators



i 4 PATENTE AUG 22 1871 I 7271917@ Elelfaloz UNITED STATES PATENTOFFICE. l

IMPROVEMENT IN ELEVATORS.

Specification forming part of Letters Patent No. 118,301, dated August22, 1871.

To all whom it may concern:

Be it known `that I, GUsTAvUs C. TIMPE, of New Orleans, in the parish ofOrleans and State of Louisiana, have invented a new and usefulImprovement in Elevators; and I do hereby declare that the following isa full, clear, and exact description thereof, which will enable othersskilled in the art to make and use the same, reference being had to theaccompanying drawing forming part of this specification, in" whichFigure lis a vertical cross-section of my improved elevator takenthrough the drum and idler. Fig. 2 is a side view of the same, partsbeing broken away to show the construction. Fig. 3 is a vertical sectionof the same taken longitud inally, with the drum and parts being brokenaway to show the construction.

Similar letters of reference indicate corresponding parts.

My invention has for its object to furnish an improved elevator forhoist-ways in stores and other buildings, which shall be simple andinexpensive in construction, convenient in use, and e'ective and safe inoperation; and it consists in the construction and combination ofvarious parts of the apparatus, as hereinafter more fully described.

A represents the guide-posts or ways, along which the platform or cage Bmoves up and down. C is a bar, which passes down through the topcross-bar of the frame of the platform or cage B, and to the upper endof which is attached the end of the hoisting-rope D. To the lower end ofthe bar C is attached the middle part ofthe spring E, the ends of whichrest against the under side of the cross-bar, through which the said barC passes, and which may be plated to prevent it from being worn by thesaid spring E. To the sides of the bar C are pivoted the inner ends oftwo levers or pawls, F, the outer ends of which pass through holes inthe ends of the cross-beam in which they Work. By this construction,should the rope D break or any of the mechanism give way, the elasticityof the spring E will instantly draw down the bar G, which will projectthe ends of the levers F against the ways A, holding the platform orcage B, securely inplace, and holding' it the more securely the heavierthe load upon it. In case the ends ofthe levers F are to act upon woodtheir outer ends should be sharp; but, if desired, toothed racks may beattached to the ways A, in which case the outer ends of the levers Fneed not be made sharp. The rope D passes over and makes two or threeturns around the drum G, around the drum or idler H pivoted to supportsat one side of the hoist-way, and over a pulley, I, swiveled at theother side of the hoistway, and to its end is attached a weight, J,which moves up and down through a well running down along one of theguide-posts A. 'Ihe weight J keeps the rope D taut, and at the same timeacts as a counter-balance to the platform or cage B. The swiveling ofthc pulley I allows the rope D to pass down vertically into the well inwhich the weight J moves, whatever' direction the other part of saidrope D may take. The idler H is designed to be used when the rope D is aManila rope. When the rope D is a wire rope the idler H is not used; butin this case the drum G should be metallic and grooved. rlhe drum G ismade with an enlargement, having an inclined shoulder, as shown in Fig.3, to prevent the rope, when a Manila rope is used, from getting out ofline with the ways A when the platform or cage B approaches the saiddrum G. The journals of the drum G revolve in bearings in frames orbrackets K L attached to the frame of the building or hoist-way, as maybe convenient. To one end of the drum G is attached, or upon it isformed, a large gear-wheel, M, the teeth of which mesh into the teeth ofthe small gear-wheel N attached to the end of the journal of the groovedpulley or wheel O, aroimd which passes the endless rope to which thepower is applied. The journals of the grooved pulleys or wheel O work inbearings in the frames or brackets L P attached to the frame of thebuilding or hoist-way. To the side of the pulley or wheel O isattached,` or upon it is formed, a smooth-faced pulley, flan ge, orshoulder, Q, to receive the brake-strap R, the middle and lower part ofwhich is pivoted to a bracket or support, S, attached to the lower partof the frame or bracket P. The ends of the strap R are pivoted to thelever T upon the opposite sides of its pivoting point, as shown in Fig.2f. The lever T is pivoted to the frame P, and to its upper end areattached the ends of two ropes, U V. The rope U passes over aguide-pulley, af, and eX- tends down through or near the hoist-way, sothat it may be conveniently reached and operated by the operator toapply the brake from any lioor of the building or from the platform orcage B at any point of its movement. The other rope, Y, passes over aguide-pulley, o', and has a weight, W, attached to it sufficient to drawback the lever T and loosen the brake-strap R Whenever the said lever Tis released. X is a curvedratchetpaWl, which is pivoted to the frame orbracket P, and against the teeth of Which rests a pin, t', attached tothe lever T, so that the said lever may be held by the said paWl in anyposition into Which it may be moved in applying the brakestrap. To theother end ofthe pawl X is attached one end of a rope or cord, Y, Whichextends down along the side of or near the brake-cord U, so that theoperator, by pulling upon the cord Y, may at any time vrelease the leverT and allow the brake-strap R to be loosened by the Weight W.

Witnesses:

WM. DINKEY, JNO. K. COLLINS, Jr.

